Create leaderboard?

Getting Started Newbie Questions
#1

How can i create an  online leaderboard connected with google play game services?

#2

Have you read this tutorial?

http://www.coronalabs.com/blog/2013/06/25/tutorial-introducing-google-play-game-services/

#3

Have you read this tutorial?

http://www.coronalabs.com/blog/2013/06/25/tutorial-introducing-google-play-game-services/